The following are useful links to the iTwin Synchronizer.
ITwin Synchronizer
https://communities.bentley.com/products/digital-twin-cloud-services/itwin-services/w/imodel-bridges-wiki/47597/itwin-synchronizer
iTwin Synchronizer Frequently Asked Questions (FAQ)
https://communities.bentley.com/products/digital-twin-cloud-services/itwin-services/w/imodel-bridges-wiki/47622/itwin-synchronizer---frequently-asked-questions-faq
iTwin Synchronizer Online Help with Best Practices
https://docs.bentley.com/LiveContent/web/iModel%20Bridge%20Administrator-v1/en/GUID-FD43F789-A531-4315-AD77-BFF1CCAC6F1C.html
Ways to Synchronize your Design Data
https://communities.bentley.com/products/digital-twin-cloud-services/itwin-services/w/imodel-bridges-wiki/47596/ways-to-sync-your-data-to-an-itwin